Bosch Rexroth OptiFeed-FS EcoDrive 03 FLP04VRS - F234 Emergency-Stop; F236 Excessive Position Feedback Difference

12-8 Diagnostic Message Descriptions ECODRIVE03-FL*-04VRS
DOK-ECODR3-FL*-04VRS**-FK01-EN-P
F234 Emergency-Stop
Cause:
The emergency stop function was initiated by switching off the +24V
present at the emergency stop input. The drive controller was brought to a
standstill according to the set error response.
Remedy:
1. Correct the problem that caused the +24V signal present at the
emergency stop input to be switched off.
2. Execute the “Reset class 1 diagnostics“ command, e.g., via the
control or the S1 key on the drive controller.
F236 Excessive position feedback difference
Cause:
After the system is restarted, actual position values 1 and 2 are set to the
same value, and the cyclic evaluation of both encoders is started. In cyclic
mode, the difference in the actual position values of both encoders is
compared using Parameter A117, Encoder difference Monitoring. If
the amount of the difference is greater than the parameter value, the
diagnostic error message F236 Excessive position feedback
difference is generated, the error response set in the parameter is
executed and the reference bits (Parameter C010, Homing) of both
encoders are cleared.
The monitoring function is inactive if a value of 0 is entered in Parameter
A117, Encoder difference Monitoring.
Possible Causes:
1. Wrong parameter for encoder 2
(Parameter C005, Position Feedback 2 Type,
Parameter C006, Feedback 2 Resolution)
2. Incorrect parameter setting of mechanical system between motor
shaft and encoder 2: (Parameter A102 Gearing,
Parameter A101, Feed Rate Constant)
3. Mechanical system between motor shaft and encoder 2 is not rigid
(e.g., gear play).
4. Defective encoder cable
5. Maximum input frequency of the encoder interface exceeded
6. Encoder 2 is not mounted to the driven axis.
7. Reference point of an absolute encoder is incorrect
Remedy:
For 1. Check Parameter C005, Position Feedback 2 Type and
Parameter C006, Feedback 2 Resolution.
For 2. Check Parameter A102, Gearing.
For 3. Increase A117, Encoder Difference Monitoring.
For 4. Replace encoder cable.
For 5. Reduce the velocity.
For 6. Set Parameter A117, Encoder Difference Monitoring to 0 (turn
monitoring off).
For 7. execute Parameter C010, Set Absolute Encoder.